Immunoglobulin A nonhuman 6 priority journal 6 Animals 4 Antibodies, Bacterial 4 Cholera Toxin 4 Lymphocyte Count 4 Rats 4 Rats, Wistar 4 animal cell 4 animal experiment 4 antibody production 4 article 4 cholera toxin 4 controlled study 4 peyer patch 4 rat 4 Adjuvants, Immunologic 2 Administration, Intranasal 2 Administration, Oral 2 Age Factors 2 Animal 2 Animals, Suckling 2 Antibodies, Viral 2 Antibody formation 2 Antibody-Producing Cells 2 Antigens, Bacterial 2 Antigens, Viral 2 Antitoxins 2 B-Lymphocytes 2